| 摘要 |
<p>1395435 Composite foam panel OWENSCORNING FIBERGLASS CORP 6 June 1973 [9 June 1972] 27043/73 Heading B5N A composite panel for use in roof insulation comprises a core of foam plastics and porous layers of inorganic fibres, held together at the fibre junctions by a binder, on opposite major surfaces of the core, portions of the foam material penetrating interstices in the contiguous fibrous layers to cause then to be functionally integral with the core but the fibrous layers being otherwise unimpregnated. The fibre layers may be woven or non-woven mats or boards of glass fibres held together by a phenolic resin binder and the foam core may be of polyurethane, polyisocyanurate, polystyrene, polyvinyl chloride, epoxy resin or phenolic resin. A porous membrane such as a non-woven rayon paper or cloth may be incorporated between the foam and one of the fibre layers. Alternative layers of asphalt and asphaltimpregnated mat may be applied over the panel, optionally with an outer layer of granules, to provide material for roof insulation. The panel is made by spraying glass fibres with a binder while passing the fibres from a fibre-forming unit to a conveyer belt, depositing the fibres on the belt with the aid of a vacuum chamber, passing the fibre layer between two endless belts to compress and densify it, the belts being located in an oven for curing of the binder, applying a foamable resin mixture to the fibre layer by means of a nozzle, passing the thuscoated layer to a further double endless belt system whilst simultaneously bringing a second preformed fibrous layer into contact with the upper face of the foam, and passing the composite between the belts whilst allowing the resin mixture to foam and thereby penetrate the surface regions of the porous fibre layers.</p> |
